Cor Caroli
Binary star in the constellation of Canes Venatici / From Wikipedia, the free encyclopedia
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Cor Caroli /ˌkɔːr ˈkærəlaɪ/ is a binary star designated Alpha Canum Venaticorum or α Canum Venaticorum. The International Astronomical Union uses the name "Cor Caroli" specifically for the brighter star of the binary.[17] Alpha Canum Venaticorum is the brightest point of light in the northern constellation of Canes Venatici.
Quick Facts Apparent magnitude (V), Characteristics ...
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Canes Venatici |
α2 CVn | |
Right ascension | 12h 56m 01.66622s[1] |
Declination | +38° 19′ 06.1541″[1] |
Apparent magnitude (V) | 2.84 to 2.98[2] |
α1 CVn | |
Right ascension | 12h 56m 00.43258s[1] |
Declination | +38° 18′ 53.3768″[1] |
Apparent magnitude (V) | 5.60[3] |
Characteristics | |
α2 CVn | |
Spectral type | A0pSiEuHg[4] |
U−B color index | −0.32[5] |
B−V color index | −0.12[5] |
Variable type | α2 CVn |
α1 CVn | |
Spectral type | F2V[6] |
U−B color index | −0.03[7] |
B−V color index | +0.34[7] |
Astrometry | |
α2 CVn | |
Radial velocity (Rv) | −4.1±0.2[8] km/s |
Proper motion (μ) | RA: −235.08[1] mas/yr Dec.: 53.54[1] mas/yr |
Parallax (π) | 32.7227 ± 0.5844 mas[9] |
Distance | 100 ± 2 ly (30.6 ± 0.5 pc) |
Absolute magnitude (MV) | 0.16±0.08[10] |
α1 CVn | |
Radial velocity (Rv) | −0.60 ± 0.9[11] km/s |
Proper motion (μ) | RA: −232.86[1] mas/yr Dec.: 55.69[1] mas/yr |
Parallax (π) | 30.6121 ± 0.0666 mas[12] |
Distance | 106.5 ± 0.2 ly (32.67 ± 0.07 pc) |
Details | |
α2 CVn | |
Mass | 2.97±0.07[10] M☉ |
Radius | 2.49±0.26[10] R☉ |
Luminosity | 101±12[10] L☉ |
Surface gravity (log g) | 3.9±0.1[10] cgs |
Temperature | 11,600±500[10] K |
Rotation | 5.46939 d[10] |
Rotational velocity (v sin i) | 18.4±0.5[10] km/s |
Age | 165+60 −70[10] Myr |
α1 CVn | |
Mass | 1.47±0.15[13] M☉ |
Radius | 1.5[13] R☉ |
Surface gravity (log g) | 4.25±0.22[13] cgs |
Temperature | 7,080[13] K |
Rotational velocity (v sin i) | 18[14] km/s |
Other designations | |
α2 CVn: α CVn A, 12 CVn A, FK5 485, GC 17557, HD 112413, HIP 63125, HR 4915, SAO 63257[15] | |
α1 CVn: α CVn B, 12 CVn B, GC 17556, HD 112412, HIP 63121, HR 4914, SAO 63256[16] | |
Database references | |
SIMBAD | α2 CVn |
α1 CVn |
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